The main problem here is your typography. Your fonts doesn’t pair well. Choose fonts that pair well from here http://www.creativebloq.com/typography/20-perfect-type-pairings-3132120
Along with this typography issue from what I see in your preview image that big yellow ticket have low resolution. Another issue is that all your elements are to close to the flyer’s edges. And finally the overall design / composition is outdated. So unfortunately this will be rejected.